We have a ford 9 inch in my Son's 70 Nova, it started out as a 57 ford rearend and we narrowed it slightly and installed torino style bearing ends and Currie 31 spline axles. It is braced and it is straight. We've run a spool and also a track-lock which is currently installed. The vent tube is near where the tube attaches to the center and it spews gearlube regularly. We've tried attaching a nipple and a hose and a valve cover breather to the end of the hose a good distance trying to eliminate the leak but no luck. The back half of the car's underside is coated with gear lube. I've never had a problem like this. Suggestions?

I think it is the nature of the trac loc for some reason. I have two 8.8 irs rear ends, one with a torsen and the other trac loc, the trac loc likes to puke fluid. I put a breather can as high as I could and ran a tube to it. No pukey but it might be full of fluid. Might do a search, think I ran across this somewhere else.

Not to give the wrong impression, the trac loc is used for fmc, just when I switched differentials that it started. I have another 8.8 with trac loc, they put a plate inside to cover the hole and I can take a pic if you are interested. On the one I am now using, the hole is on the upper passenger side, I extended the outlet down into the pumpkin so the climbing lube wouldn't have such a tendency to come out.

Good info, the vent on this one is on the passenger side at about the 2 O'clock position when veiwed from the rear. We are going to plug that hole and put one in the axle tube closer to the U-bolt area and see how that works. For something that is just supposed to act as a vent I have no idea how so much fluid can flow out. We even tried using some adapters and a heater core hose to a valve cover breather thinking the diameter would help-no luck.